As of August 2019[update], the bridges carried seven motor vehicle lanes with four shoulders, and one non-motorized multi-use path.

Upon its opening, the existing General Sullivan Bridge was converted to serving southbound traffic only;[16] this doubled the capacity of the crossing from what it was prior.

[7] The Little Bay Bridge and its access roads on the Dover and Newington banks had been prone to traffic congestion during morning and afternoon rush hours.

[20] Three called for expansion of the Little Bay Bridge to six or eight lanes and restoration of the General Sullivan as both a pedestrian/bicycle way and alternative for buses and overflow traffic.

Renovations were completed in November 2015, although the Rowe bridge remained closed for several years due to significant realignment work on the nearby U.S. Route 4 interchange.

[25] In September 2018, the General Sullivan Bridge was permanently closed for all uses, due to safety concerns that it was unsound.

[30] A new merging pattern onto the Rowe bridge, better enabling traffic from U.S. Route 4 and the Spaulding Turnpike to utilize the four lanes, went into effect in April 2020.

[32] While the General Sullivan Bridge "is nationally significant... as an early and highly influential example of continuous truss highway design in the United States", its future is uncertain.

[19] While the Rowe bridge was built to accommodate four lanes of northbound motorized traffic,[27] its current configuration is limited to three lanes in order to accommodate a non-motorized multi-use path, the removal of which would be enabled by restoration or replacement of the General Sullivan Bridge, giving that effort additional relevance.

[33] In February 2023, the New Hampshire Department of Transportation (NH DOT) estimated the cost of replacing the original bridge with a 9-foot-wide (2.7 m) bicycle and pedestrian walkway at $34.8 million, with a 2026 completion date.

[35] In June 2023, $20 million was allocated for the project from the federal Rebuilding American Infrastructure with Sustainability and Equity (RAISE) program.

[36] Although unnamed, the General Sullivan Bridge appeared in a 1997 episode of WWF Monday Night Raw, when Steve Austin threw the WWE Intercontinental Championship belt (then belonging to The Rock) into the river below.